maximum-depth-of-binary-tree solved

Author: hsskey

maximum-depth-of-binary-tree/hsskey.js

@@ -0,0 +1,25 @@
+/**
+ * Definition for a binary tree node.
+ * function TreeNode(val, left, right) {
+ *     this.val = (val===undefined ? 0 : val)
+ *     this.left = (left===undefined ? null : left)
+ *     this.right = (right===undefined ? null : right)
+ * }
+ */
+/**
+ * @param {TreeNode} root
+ * @return {number}
+ */
+var maxDepth = function(root) {
+    function dfs(node) {
+        if(!node) {
+            return 0
+        }
+
+        const left = dfs(node.left)
+        const right = dfs(node.right)
+
+        return Math.max(left, right) + 1
+    }
+    return dfs(root)
+};